250 Maraging-Maraged at 900 F Bar: MIL-HDBK-5J Design Allowables
show US units (ksi, Msi, lb/in³) open the MIL-HDBK-5J tool compare against temperature find alternatives
| Material class | Steel |
| Alloy / temper / form | 250 Maraging / Maraged at 900 F / Bar |
| Specifications | AMS 6512 |
| Handbook | MIL-HDBK-5J, 31 January 2003, section 2.5.1.0, Table 2.5.1.0(b) (pdf page 94 of the chapter file) |
| Dimension bands | 2 |
| Density | 7916 kg/m³ |
Design Mechanical and Physical Properties (room temperature)
Converted from the handbook table (ksi, Msi, lb/in³) and rounded to 4 significant figures; dimension bands in inches with mm in parentheses. Bases: A and B are statistical minimums (99 % and 90 % probability at 95 % confidence), S the specification minimum. Grain directions: L longitudinal, LT long transverse, ST short transverse.
| Dimension band | 0–4 in (0–101.6 mm) | 4–10 in (101.6–254 mm) | |
|---|---|---|---|
| Specification | AMS 6512 | AMS 6512 | |
| Basis | S | S | |
| Ftu, MPa | L | 1758 | 1689 |
| LT | 1758 | 1689 | |
| Fty, MPa | L | 1724 | 1655 |
| LT | 1724 | 1655 | |
| Fcy, MPa | L | 1793 | … |
| LT | … | … | |
| Fsu, MPa | L | 1020 | … |
| LT | 1020 | … | |
| e, % | L | 6 | 5 |
| LT | 4 | 3 | |
| ν | 0.31 | 0.31 | |
| ρ, kg/m³ | 7916 | 7916 | |
Effect of Temperature
Percent of the room-temperature value against temperature, digitized from the handbook figures (the shortest exposure of each figure, every 10 °F). Strength curves give the allowable at temperature; "after exposure" curves give the room-temperature property after a soak at that temperature.
Strength allowables at temperature, percent of room temperature
Moduli at temperature
| °C | F_tu | F_ty | F_cy | F_su | F_bru | F_bry |
|---|---|---|---|---|---|---|
| -184 | 118.6 | 118 | ||||
| -129 | 112.7 | 109.6 | ||||
| -73 | 107.7 | 105.3 | ||||
| -18 | 103 | 101.8 | ||||
| 38 | 98.8 | 99.3 | 98.4 | 99.2 | 99.8 | 99.1 |
| 93 | 94 | 95.8 | 92.5 | 94.9 | 97.2 | 95 |
| 149 | 90.4 | 92.6 | 88.4 | 90.8 | 94.9 | 92 |
| 204 | 87.6 | 89.3 | 85.4 | 86.4 | 92.4 | 88.9 |
| 26 | 86.4 | 86.3 | 83.2 | 82.2 | 89.6 | 86.2 |
| 316 | 85.4 | 83.3 | 81.7 | 78.4 | 86.8 | 83.5 |
| 371 | 83.4 | 79.9 | 79.4 | 76.5 | 83 | 79.6 |
| 427 | 78.9 | 77.1 | 75.8 | 76.1 | 77.4 | 74.2 |
| 538 | 61.1 | 53.2 |
Factors in percent of the room-temperature allowable.
Other 250 Maraging Tables
- 250 Maraging-Maraged at 900 F Plate (Table 2.5.1.0(b))
- 250 Maraging-Maraged at 900 F Sheet (Table 2.5.1.0(b))
Source and Use
U.S. Department of Defense (2003). Metallic Materials and Elements for Aerospace Vehicle Structures. MIL-HDBK-5J, 31 January 2003 (public domain). The values are the handbook's design allowables as extracted from the chapter tables; check the printed table before use in a certified analysis, and note that MIL-HDBK-5J was superseded by MMPDS, whose later editions may differ. No warranty is given.